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AP Biology
Review for unit 1 MCQ
| Question | Answer |
|---|---|
| Molecules with the same number of carbons and other atoms may behave differently if the atoms are arranged exactly the same | False, differently |
| The carbon that makes our bodies comes from plants, who get carbon from the atmosphere, not the soil | True |
| Hydrogen bonds are weak attractions between the oxygen of one water molecule and the hydrogen of another water molecule, and can lead to adhesion between water molecules | False, cohesion |
| RNA contains adenine, cystine (not thymine), guanine, and cytosine for bases | False, uracil |
| In general more bonds in a molecule will increase the stability of the molecule | True |
| Amino acids have an amino group on one end and a carboxyl group on the other. When joined together, the amino group can bind with another amino group, forming a dipeptide through dehydration synthesis | False, bind with carboxyl group |
| DNA is double stranded, where the sides run in opposite directions | True |
| In DNA, Adenine-Thymine (2) base pairs denature more easily than Guanine-Cytosine (3) base pairs, since they use more hydrogen bonds | False, less |
| Predator species are dependent on their prey. If prey populations decrease, the predator populations will increase | False, decrease |
| Hydrogen bonding occurs between the hydrogen, with a positive charge, on one molecule, and a positively charged atom in a different molecule | False, negatively |
| Hydrolysis of carbohydrates involves the addition of water to break sugar monomers apart | True |
| Remember that organisms cannot make new elements from existing elements. They may be able to break down molecules, such as breaking down glucose into smaller molecules, but they can't change a carbon atom into an oxygen atom | True |
| When a protein is folded into its tertiary structure, the hydrophobic amino acids will tend to fold towards water, and the hydrophilic amino acids will fold towards the water | False, away |
| Dehydration synthesis in proteins is the removal of water to unite amino acids | True |
| When two amino acids are joined together in a growing protein, a hydrogen bond is created between them | False, covalent bond called peptide |
| Adhesion is when water molecules, which are polar, are attracted to other molecules which are non poplar | False, polar |
| Polysaccharides can exist as chains or branched chains of amino acid monomers | False, monosaccharides |
| Dehydration synthesis of large molecules, including proteins and carbohydrates, involves the removal of water as a byproduct | True |
| Proteins can be broken down into polypeptides and individual amino acids by the process of dehydration synthesis | False, hydrolysis |
| Most sugars and lipids are made of just carbon, hydrogen, and oxygen. But the synthesis of proteins and nucleic acids require nitrogen also | True |
| Surface tension is the result of covalent bonding between water molecules at the surface of a body of water | False, hydrogen |
| The bases within DNA are held together by weaker covalent bonds, and can easily be disrupted with high energy exposure, such as heat or UV radiation | False, hydrogen |
Created by:
Lahp16
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